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Old 12-31-2009, 02:25 PM   #1
Yulri
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93 Impreza L, 91 Legacy L

Default Some questions on adding a turbo to the 1.8l

First off, I have an 07 wrx that i'm happy with but recently picked up a 1.8l fwd impreza l for a price i couldnt really refuse. I've been doing some research on the 1.8l and was somewhat surprised (dont know why i was now that i think about it) that people add turbos to them. I've seen a wide range of different part set ups for them and was wondering whats the bare basic parts one would need to turbo it? I believe the stock 1.8 gets 100hp to the crank and i'd probably want around 140-150ish to make it just the tiniest bit more fun granted its been pretty fun already.

From what it looks like I'd imagine you need the 2.2t's head , some sort of intercooler, a td-04, wastegate, intake manifold, and a different exhaust.

I was also wondering, if you run it with about 6-8 psi how much power can you expect and would you need em? Do you also need the 2.2t's ecu? How fast are turboed 1.8s? I haven't really seen many people saqying how much they dynoed or hit in a 1.4 mile.

I'll continue my searching until then but hopefully someone else who's already looked through the loads of information can point me into the right direction. This whole fwd e-braking thing has become a lot of fun especially without the fear of damaging a rear diff. Surprisingly the car handles not that bad and even with a rear drum and no abs doesnt brake that bad either... I'm impressed not to mention this engine has 221,000 miles on it. (i'm considering a rebuild if i ever went the turbo route....thats just how cheap i got this car)


OR do you guys think I should just put sti struts on the car from an 04 a front sway bar and autox the thing til it dies? i never found out about this anywhere else but do 04 sti struts work on a fwd car? I was looking underneath the car and they look similar as far as how they bolt up
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Old 12-31-2009, 02:34 PM   #2
dr3w
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Why not use it as a daily and put the money on your wrx instead ?
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Old 12-31-2009, 05:32 PM   #3
Yulri
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i guess im pretty happy with the way the wrx is right now. If anything i'll add a vf39 and be done with it but then i'd have to worry about the transmission. Sitting at stage 2 with a grimmspeed bcs its plenty fast for me. I'm just curious what routes one could go
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Old 01-02-2010, 01:33 AM   #4
Meat Supply
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wow. well i had a 95L awd. was going to turbo it, but i crashed it first. they re pretty stout motors, and will handle at least 5-6 Psi. but at that point a 2.2 would probably give you similar power, and the 1.8 ecu should run the 2.2 okay, maybe a little rich from what i've read.


short answer is that they'll all say it's not worth it but that's up to you.
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Old 01-02-2010, 03:32 AM   #5
Yulri
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well funny thing is someone has a 91 legacy in town with the 2.2 i believe and he wants 600 for the whole car in running condition that it is now so i could do that... iono i figured it might be somewhat easier to turbo the car than drop a new block into it
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Old 01-02-2010, 08:40 PM   #6
Meat Supply
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might be. the crossmember has to changed or notched for the up pipe, unless you get a custom one or something. they say you can use a rising rate fpr in conjunction with the turbo or whatever. just some ideas. PM red devil for info, he'll be able to tell you all about and in the mean time, read his build threads.
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Old 01-06-2010, 04:34 AM   #7
joejoe69
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Quote:
Originally Posted by Yulri View Post
How fast are turboed 1.8s? I haven't really seen many people saqying how much they dynoed or hit in a 1.4 mile.



I dyno'd at 237.9 whp / 235.5 tq (280 flywheel hp, 279 flywheel tq) at the front wheels on a VF34, at 18.5psi, with a very, very, very rich mid range. No tuning during my dyno session, just pulls. The rich dip has been fixed and is probably making more than what it used to according to my butt dyno, haha. I haven't dyno'd since but I would like to go again soon since I added some other new stuff.

http://www.rs25.com/forums/f7/t81773-project-ej18t.html

As far as how fast? I could beat a stage 2 STI, 350 whp WRX, and stay half a car length behind a WRX with a GT30R'd ver7 motor. These were rolling runs on the freeway. We have no 1/4 mile track anymore, sorry...

Yes, I have a FWD 1.8L Impreza. If you had an AWD Impreza, you'd make less than I do since I have less drivetrain loss. PWR comes in very handy.
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Old 01-07-2010, 04:26 AM   #8
Yulri
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thanks alot for the video and info joejoe that is certainly pretty impressive. I'm still looking into the 2.2 turbo head route but for right now i'm about to pick up a cheap donor legacy with a 2.2 in it that i'm going to fix up a bit and put into the impreza. I think I'm going to keep the 1.8 out and slowly work on it. I'm thinking of a fun little rally beater for now as apparently imprezas dont do that badly in the fwd class for rallyx.

Might i ask what your set up is joejoe and what type of engine management youre using?
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Old 01-07-2010, 01:04 PM   #9
joejoe69
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Not real engine management by todays standards but I'm using an APEXi SAFC Neo and SITC timing controller with an AEM UEGO wdeband gauge and TurboXS knocklite. So far I've gone over a year with it and no knocking or blown motor.
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Old 02-15-2010, 06:42 PM   #10
Yulri
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93 Impreza L, 91 Legacy L

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could you run a td04 on a phase 1 na ej22 running off of just wastegate pressure without tuning? I think i've seen this around here and I imagine the wastegate pressure is around 6 psi. I can't think of a method of tuning that wouldnt involve quite alot of money
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